Ribbon mechanism.



O. SPIRO.

RIBBON MECHANISM.

APPLIOATION FILED JULY 29, 1910.

Patented m 2, 1911.

5 SHEETS-SHEET 1.

[/VVENTOR U. SPIRO.

RIBBON MEGHANISM.

APPLIQATI ON FILED JULY 29, 1910.

99%917'. Patented May 2,1911.

H Ni 1: N! 0/8 0. SPIRO; RIBBON MECHANISM.

APPLICATION FILED JULY 29, 1910.

Patented May 2, 1911.

5 suns-swam a.

G. SPIRO.

RIBBON ME APPLICATION FILED JULY 29,1910.

GHANISM.

' Patented May 2, 1911.

5 SHEETSSHEET 4.

III: ll-llll [NVE/VTOR Afforizey C. SPI-RO. RIBBON MECHANISM.APPLICATION FILED JULY 29, 1910.

Patented May 2, 1911.

5 SHEETSSHEET 5.

R mmww \k QWDNKN\|\ ZNVE/yTOJe Gig/2646,2100,

#M ED TATS CHARLES srmo' on NEW YORK, N. Y.

Specification of Letters Patent.

Application filed July 28,: 1910 Serial No. 574,523.'

' RIBBON MEcHA 'IsM."

To all whom inf may concern:

Be it knownthat I, CHARLES SPIRO, a citi' zen of the UnitedStatesyresiding at New York, county OfiNew. York, State of New York,have invented'certain new andusefut Im' rovements in, Ribbon Mechanism,of whichthe'following is a specificatlon, reference being had thereintotheaccompany ing drawing.

.la-rly .upon the. front in This invention relates bro'adly to the artof itypewriting inachines and specifically to ribbonmechanism adaptedfor, use particustrike type of typewritmachines. Y I

to construct a novel and simple ribbon mech- 'anismtfor front strikemachines in such manner that the; longitudinal movement of the ribbon Iis automatically: reversed when a pro-determined amount: of ribbon isrolled upon the windingspool.

A further, object A of this; n31

construct a ribbon mechanism, for typewriting machines wherein a thelongitudinal movement of theribbonmaybe quickly and easily changed at-.the will of the operator, andanay also be automatically changedwhen apredetermined amountof ribbon has passed the printing'point. v

Anotherlobj eot of this, inventionlis to p rovide a ribbon-inechanisrnfor typewr ting machines wherein a niulti-color ribbon may be easilyandquickly shifted in such'man-j ne rthatpredetermined portions-will ,beprer A still further object of this invention vibrator may besent-edandtlocated over the printing ,point during the printingope1'at1on-., V

1 Another object ofrthis invention is tovprovidea ribbonmechanism with aribbon .vi

brator having. the upper portion thereofso.

constructedas to form anwerasing guide and also a line indicator fol?thQprintii g point,

-Anotherobject of this invention is to provide a ribbon mechanism.wherein; the amount of movement or throw ofithe ribbon pro-determinedat the will oftheoperator. .i

- Another objectof this invention is tocon- "struct a ribbon mechanismwherein the ma:

oiity of the elements thereof are formed from stamped sheet metal...parts.

' ventionjiwill he principallobiect-jof thisinvention by the appendedclaims to construct a ribbon mechanism in' such manner that alightfriction brake is at all times applied to the ribbon in such manner asto prevent the ribbon from becoming slack or loosebecause of unwindingtoo ra Idly fI'OIII the free ribbon spool during t e printing operation.

Still other and further objects of this invention will in part beobvious andwill in part be pointed: out in the specification hereinafterby referenceto the-accompanying drawings wherein like numeralsare usedto indicate like parts, and the scope of the ine more specificallypointed out Figure l is a 'frontelevational vievvsho'wmg therelationship of the ribbon spools,* vibrator and attendant mechanisms,withregardto'the' other members' of'the typewriting machine; Fig 2isa'view showing Patented-May 2, win

ty ewriting machine in sectional elevation taken on the centerplaneofthe machine and showing the relationship of the various elementshi the ribbon mechanism.- Fig 3 is a detail view showing the ribbonmechanism actuating devices: as connectedto thelspacl- Fig; 7 is adetail. iew

tion. vFig; '8- isa 'pian view of the holding (log .Sho vn in Fig. 7 9is adetail 'view showing one or the reverse levers infelevation. FigL 10is a plan View of mai s-a ni s-m shown in Fig. 9, v Fig. 11 a detailView showing" one of. thesdo'g" retainers' iii elevation; Fig. 12 is aplan} View showing the dog retainer illustrated Fig; 11,": Fig. .13 is aview showing the 'multi-color shift mechanism assembled. "Fig; 14 is japlan view of a 4 portion ofjthe 'multi'-color' shift *me chamsm. Fig;;15 1s a view show ng a portion ofth'e mold-color shift mechanism in'frontelevatio'n Fig. 16 i's 'a view showing one of the connectinglinksjn side"eleva-' tionl Fig.1 1? i'sai view showing the linkillustrated in 16 edge elevation.

Fig. 18 is a plan View showinga portion of the r'ocker frame ig; 19, isa iewaw:

ing one of the actuating bell cranks inelevation. .Fig. 20 is a planview of the; bell crank illustrated in Fig. 19. Fig. 21 is a viewshowing the detaining spring in eleva- 5 tion. Fig. 22 is a plan view ofthe part illustrated in Fig. 21. Fig. 23 is a view showing the mechanismfor reversing the longitudinal movement of the ribbon in assem- A bledrelationship. Fig. 24 is a view showing the mechanism illustrated inFig. 23 in elevation. 7

Referring particularly to Figs. 1 and 2 of the drawings, it will benoted that several features of the typewriting machine are 1 illustratedwhich do not specifically cooperate with the ribbon mechanism, but thesefeatures and elements are illustrated for the purpose ofshowing'generally the relationship of the ribbon; mechanism to thegeneral 2 construction of the typewriting machine.

The portions of the typewriter which do not relate specifically to theribbon mechanism will be described hereinafter in a general sense, thespecific description appertaining 2 particularly to' the especialmechanisms 'em bodyin'g the construction used in the ribbon actuatingdevices. However, I desire that it shall be understood that suchportions of v the typewriter which do not pertain'to ribbon mechanism,are not claimed in'this applicjation. i n Referring more particularly toFigs. 1

and 2 of the drawings, the machine frame comprises a main portion whichincludes sides 1, rear portions 2, front bar 4, and supporting posts 5,upon which is mounted a top plate 6. A front board or plate 7,

ismoun'ted in'the'rearof a key board 8," and protects the general typebar construction, not shown inthe drawings. A platen c'arriage9, whi'hsupports the shifting carriage frame 10,'is mountedforrec'iprocation'upon' a carriagebed 11, by means of bearing balls 12,which are adapted to runin accurately carriage frame 10, supportsaplaten' 14, and a paper feeding device 15. The platen carriage 9 isadapted to'be driven by means of carriage'propulsion' mechanism'lG,which is supported by the top plate 6, insuch manner:

as to have operative connection with the platen carriage 9. is arrangedat the rear of the machine and is operatively connected with shift keys1 8 and 19, in suchmanner asto cause the shifting carriage frame 10 tobe raised and lowere at the will of the operator in order to positionthe platen 14 in the differentp rinting positions. Line spacingmechaniSnil QO, is in order to enable the platen to be turned for linespacing. As the above set'forth mechanisms do not i 4 tion of thisinvention, further and more detailed explanation is thought tobe unneeemanner that the V are moved vertically. for each actuationof actuatinglinks. I st re supported at theirupper endsby-be-v .ing pivotallyconnectedasat 45, :ind,.46,-;t0. small bell cranks 47 and 48, whichtranslate. machined grooved ball races. The shifting and 52, to theother arm of, the bell cranks Shifting mechanism '17,

sheet material, are provided with wide on,

arranged at the right of the carriage frame specifically form a poressary, and therefore attention will now be directed specifically to theribbon mechanism. V p 4 1 Referring more particularly toFigs. 2,.3, w13, 23 and 24, the ribbon mechanism com- 7 prises ribbon spools 21 v and22, that are mounted to rotate upon vertical stub shafts 24 and 25respectively. Each of thestubshafts 24 and 25, carries fixedly mountedthereon ratchet wheels 26 and 27 respectively, and are provided at theirlower ends with stud screws 28 and 29, which are adapted to passthrough'vertical shift links '30 and 31, which are connected with theplaten shifting mechanism and cause the 0 ribbon spools to be shifted ina vertical'drrection when the platen carriage is shifted from oneprinting position to another.- Asthis specific mechan sm is claimed inasepa: rate application filed August 4, 1910, Serial 575,523, furtherdescription of the shift: ing features of "the ribbon spoolsis omittedfrom this application. Vertical actuating links 34 and 35, are pivotedto the actuating bell cranks 36'alnd 37, upon which-the universal bar 38is' fixedly mounted .in such actuat nglinks 34" and 35' the universalbar when moved finder the influence of a sub-lever 39, (one of which;is7

illustrated in Fi .1 13) during the printing operation. In order thatthe verticallinl'ifij 34 and 35 may be actuatea ian g p ci' bar 40 isoperated, by striking the finger key 41 formed npon the forwardendthereofithe lower ends-of these links are provided with Offset pbrtdn' M 64 whi h are adapt ed to passjunder the arms to or mena i g bar,andto thereby rorm nios raave cone 1 motion between" the pacing b rand}. the. The aetuatinglinks 34 and the vertical motion of theactuating links into a horizontal motion in order to operate actuatingdogs 49- and 50, which are ,pivet ally supported at their rear .ends'fasat .51

47 and 48 respectively.) 1 Referring particularly to Figs. 3,123- and24, it willbe noted'thatthe actuating dogs 49- and 50, which, re formedofresilient gagingflfaces 54 and 55, which are adapted to engage theteeth of the ratchetwheels 26- and 27 respectively. The-forward ends ofthe actuating dogs 49 and 50. are hi furcated and are adapted to beguidedby lugs 56 and 57, which arestruck up integral; from the sheetmetal holdingdog's' 58 and 59. The ratchet wheels 26 and27 areadaptedLto be, held froml retrograde movement when under the influence;oft-he actuating mechanism, by means of the hereinbefore with the.-inner end adiiiotedg ratchet wheels}; The uholdingdogsfig andv-59',*:are; formed in the bell cranks andnrepivoted to the top plate 6,as at 60 and; 61. and :59,' are provided withrear extensions and i36-:which are constructed ,in such manner as to be' adaptecl to co-no'twithdog retainersor latch members 67- and 68, for a, IJIII'POSeiWhlChwill bemore specifically de- Q scribed hereinafter;- connecting fyqke orReferring particularly to Figs and 24,: follower, members 74 and ,,7;5

inbefore send, cgnryon their lower ends ca-m menibers 78,-a-nd 79; QTheforward ends ofthe li h l sp i pre'ssedegainst a roll qoii ribboncarried by" nd 22',-by'.means of} followers 7 4 and 1 75, :a

the ribbon "spools, 21 a light coiledrspringsfill ohdISI, in such man.-11erthtit-;t he 'posit1onof the ram members is determined. by the nmonntof ribbon which is wound :on; tlfe'flspools. The reajrflend's of h i-fele 'in mbersFi-end 5, re pr the :foll0\\"ers ;1nay' inannally i actuatedto cause the parts to 'be ,thr'on rn in position to reverse the ribbonDog reta nrsor latch members (57 and (iS here nhefore mentioned,

are piotallyfmonnted' as at 82 and "84, to the. top plnte 6,' a nd' n1'eresilientlyheldwith midi-'95., that" are formed integral with theholding dogs 58 59 f The outer ends of theidoggretainersl' or let 'chmembers '66 kind 6 7 ,i e;re pro v'i(led with doulole faces as at 96'.

miter .e of the'caniniemhers 783ml 79.

ziiidiQQ. are. edep'ted to co ma er of r ght ii g p spool to the other,

ingl' 'vith 'it the cam 1tached to the followerfstub "shaft; doing' itwill be noted that the coiled spring. lever 69,-'is xpivotallyattached:to the topw plate '6,- as s t-70,,- and isj-adapted to contact bellcrank ;portions 7,1 andfl72 of the holding-dogs 58 and 59,; in suchmanner as t JcauSe-Qne pairofootnating holdingdogszto bedisengaged-from. their: companion =mtcheh: .w-heel. hen,- the other pairof actuating dogs isthrowninengagenient with the other Of the .rqtohetwheels, hyme'aris of mechanisms ;Wh l0h will, nowzbe more. specificallyvdescribed. I 25, are pivotally mounted upon short stnbshafts? if) and77"'respec t i vely', inf suchjmanner as to; permit of a verticalmovementof the ribbon? spools during theshifting n oyement here-imentioned, The stub shafts 76 and 'TZJare mounted for rotation in the opplate "are disengaged from the o operate the rear extensions 65 and 66voft isimamdo s m snohi'me'nneras to" V and 'an' actna'tiiig'jdogo'iifiof engagement with'theirrespective ratchet'jvhee'l'when it" isdesirable that thefri'bb'on should bewound zThe holding dogs" 58 uponfthe'opjjosite ribbon spool." It will be:

noted that as: the'ribbo lifiswonnd' from one" moves inwardontlieflun'it inding 'splool carrythe follower iiiember lber which; is t;

In- .so

attached to the caiii niember 'and'tjo the parme iteld ng. d brought-'u'nd er greater p'z rticular coiled 1 spring it Will be noted,- is

Whichitheilribbon isjbeiiig Wound; and-this bfong'htnnderlsslimd lesstensionp: Vhen x the [ribbon I heist been? siiilicie'ntly unwo nd i Ifrom the free' spoo'l its tofa l-low-tlre ca-m: meniber etjttac'hed tothis particular "follower to e age he .feceton therdog retainer, the

c said dog retainer' will'be'forcetl rea wardiy Iistiflicientlyftoflrelease the holding an'd*ac-- tuz ting dogs; which'will. thrown intoflenf gegeme'ntwith the part irnla r; ratchet Wl eel-'because of the excess it'ensioirin the coiled springfconnec ting the camme1nbe1"and-"thel1old1ngf lQg, as compnred to tlieten sionof' "the cammember andt-he holding dog which;

are beneath the full ribbon spool; 'As the actuating dog and the holdingdog -a're thrown into engagementwith one ratchetwheel, the actuatingdog-mid holding dog pposite ratchet Wheel because of the operation ofthe connecting yoke or bar 89. 1 It will be noted that. the engagingfaces 54 and 55 on th actuating'd'ogs and also the engaging-faces 62 and64 on the holding dogs, are of as'ufiicient width to engage "the ratchetwheels in either of the seveml positions to which the l.

ribbon spools may be shifted in" a vertical d rect on because "of theshift ng mechanism herein'beforementioned.

' Having described thefgtetuating 'niecha- 'nism for the ribbon spools;attention is parti'ofnla-rly' called to Figsi 2; 1-3, 15 and 18,.

which 'refer specifically to the actuating mechanism for the-ribbonvibrator or shuttle and to the'de'vices Whereby'the-shuttle is vibratedto different printing positions in order to position; vnri'onsportionsof': multi-color "r1bbon over the pl'llltliig point; M

A' bell crank member aboiith pivot member 101, whiclvisaxitlly 100',is'attache'd to the" universal bar 38, andjis inonnt-ed to rot'siite;

alinedw'itli the 'axis 11 pon ivh'i ch the universa'l bnris'mounted toturn?The hoi'i'zontalf portion of "the bell crankmember ispro vided with.a T-sha'ped open" slot 102; "and 1 carries a' resilient detain1ng.spring member k4. 104, which has three detention" notches 105, in itsunder surface. The outer-" end offthe resilient member 10 1' isadaptedtocontact against a small stop pin 106; stud screw 107 is carried by avertical connecting link 108 and'is adapted to be maintained in eitherof the detaining notches in the resilient spring member 104. -Therelationship of the detaining notches 105 on the resilient detainingspring me1nber 1, is such that i the middle notch is directly overtheopen portion 109 of-the slot 102. The vertical c meeting link 108, isformed with an offset d pending portion 110 on its lower end, 1 w ich isadaptedto lie 'within a slot formed in he outer end of a controllinglink 111, whiclkpassesihrough an opening in the key lever. guide frame112, and is connected at its outerf'end with an operating lever 114:,that ispivota-lly mounted as at 115, to a bracket 116, which is attachedto the side wall 1 of the machine frame, and is provided on its upperend with a finger piece 117, which enables the operator to position theseveral parts in order to regulate the ribbon jthrowv for variousmulti-color chan es in 'a manner hereinafter to. be describe The.

' length of thedepending portion 110 on the vertical connecting link,and the. depth of theslot in the controlling link 111, is such as-toermitof a vertical movement of the actuating link without thedisengaging of the connecting link 108 from the controlling link 111.The upper end of the vertical connecting link 108-is pivotally attachedto a yoke 118, 'hichcarries the ribbon shuttle or vibrator 119 pivotallymounted upon the front portion thereof, The yoke 118 is supported at itsrear ends by being pivotally attached as at 120 and 121 to the inneryoke 122,' which is pivotally supported upon-depending bracket members124:v and 125, that are ,ma e integral with the top'plat'e (hand isadapted to be held in definiterelation to 45 the printing point bymeans. of the platen shift-ing mechanismhereinbefore mentioned,

l which is connected to the inner yoke 122, by

means of adepending lug 126. The inner oke 122, carries uponits outerend a printmg point indicator and. line finder 127, shown particularlyimFigs, 11., 2and 13; By actuating the finger piece 117, the verticllc0nnect1ng'1ink'108 is, moved through thejmdium. of the such manner asto controlling link 111, in osition the stud screw 107f in any one ofthe several detention notches'105r; in the resilient detaining springmember 104., When-the stud member is in the position shown'in' Fig. 13,that is, near: Qlpst to the ivot 101, the -ribbon throw will be actuatedthrough a minimum amount of mov and only the upper portion of the rigaawm be thrown'over the print'inm oint, JVli'e'h the stud screw 107 isretained 88 m the seeend notch, the bell crank 'mernber 100, upon beingactuated, will. not move. the. 7 g for thereason, that the stud 107 willride out through the open portion 109 of the slot 102, and-when.vertical connecting link 108,

the parts are in this particular relationship the type of the machineWill'st-rike without first strikingthe ribbon, and, this position ofparts is particularly adapted'fo'r making stencils to beused inmimeographqwork, Asthe' stud screw 107 is moved to the third or extremeouter detaining notch, the rib-- bonshuttle or vibrator 119, willreceive its the ribbon a suflicient distance over the printing the lowerportion thereof and thus will print point to-enable thetype to strike atgreatest degree of movement and'will carry I from a diiferent field ofthe -ribbo1fthan would be printed from if the stud screw 107 were in thefirst detaining notch.

Having thus described myinverition what v I desire to claim is 1. In aribbon mechanism for typewriting,

machines, the combination of ribbon spools, a ribbon vibrator, means foractuating said ribbon vibrator, shafts upon which'said ribbon spools aremounted,-rat'chet,whe els fi'xedly mounted'upon said shafts,holding dogsfor sand ratchet wheels, "actuating dogs adapted to actuate saidratchetlq wheels means for operating saidfactuatingdogs, and meanscontrolled by the amount of rib bon on said ribbon spools fordetermining a when one of said actuating dogs shall be renderedinoperative, said last mentioned means including opposed spring members,

the operative tension of e'ach springmember bein 1n lnver'se proportionto','the' amount of ri bon upon its respective ribbon spool. c

2. In a ribbon mechanismfor front: strike typewriters, the combinationof ribfl a ribbon vibrator, mea s for ac-- shaftsadapted to carry saidribbon spools, ratchet wheels; fixedly mounted upon said-shafts, holdingdogs adapted to cooperate with said ratehet bon spools, A tuating saidribbon vibrator,

wheels, actuating dogs arranged to actuate'f said ratchet wheels,pivotalm'eans adapted,] to bear against the ribbon onsaidribbon} spools,means includingopp'osed springs conmeans for operating sai actuatingdogs.

3. In a ribbon mechanism for fro'nt strike typewriters, the combinationof ribbon spools, a ribbon vibrator, means for actuattrolled by saidpivotal means for re'ndering 'l one of said actuating do s inoperative,and,

ing said ribbon ,vibrator, vertical shafts adapted wheels fixedlymounted upon said vertical shafts, holding dogs adapted to cooperatewith said ratchet wheels, actuating dogs arranged to operate saidratchet wheels piv to carry said ribbon spools, ratchet otal followersadapted to bear upon the rib;- bon Wound upon said ribbon spools, latch-members adapted to retain-said holdingj'dugs and actuating dogs ininoperative 'position, I,

atively connected withsaid last mentioned means and means for actuatingsaid actuating dogs.

4.111 a ribbon mechanism for front strikev typewriters, the combinationof ribbon spools, a ribbon vibrator, means forectuating said ribbonvibrator, vertical shafts adapted to carry said ribbon spools, pivotalfollowers adaptedrto bear against the ribbon on said ribbon spools,vertical shafts in which saidpivotal followers are mounted, ratchetwheels operatively connected with said ribbon carrying shafts, holdingdogs adapted to cooperate withsaid ratchet wheels, actuatingdogs adaptedto actuate said ratchet wheels, means for actuating said actuating dogs,latch members, cam members 'OPQIZJ'ZIV-Qly connected with said'followercarrying shafts and adapted to cooperate with said latch members, meansfor enabling one of said latch members to retain one holding dog and oneactuating .dog in inoperative position, and a yoke member operativelyconnecting said holding dogs.

5. In a ribbon mechanism for front strike typewriters, the combinationof ribbon spools, a ribbon vibrator, means for actuating said ribbonvibrator, vertical shafts adapted to carry said ribbon spools, ratchetwheels mounted on said vertical shafts, ac-' tuating dogs adapted tocooperate with said ratchet wheels, holding dogs for said ratchetwheels, means for retaining one ofisaid actuating dogs and one of saidholding dogs in inoperative position, and means for actuating saidretaining means to release said dogs, said last mentionedmeans'including opposed springs, the efiective strength of each springbeing inversely dependent upon the amount of ribbon on its respectiveribbon spool, substantially as described.

6. In a ribbon mechanism for typewriting machines, the combination ofribbon spools, actuating means for said ribbon spools, tension springsarranged in opposing'relationship, means controlled by the amount ofribbon on said ribbon spools for determining the eifective strength ofsaid tension springs, said means being opera- 'tively connected withsaid springs in such manner as to cause the tension strain in one ofsaid springs to be increased, and the tension stram in the other of saidsprings to be decreased, and means for disengaging sa d actuating meansfrom one of said ribbon spools."

7. In a ribbon mechanism for typewriting machines, the combination ofribbon spools, means for actuating said ribbon sp ools, said meansincluding a pair of actuating dogs and a pair of holding dogs, means foractuat-ing said holding dogs, spring controlled means for rendering oneof said actuating dogs and one ofsaid holding dogs inoperal'JYG. andmeans for rendering the eiiective tension of said spring controlledmeansinversely proportionate to the amount of riba hen on the respectiveribbon spools.

.8., A ribbon. mechanism for a typewriting machine, including ribbonspools, means for actuating said ribbon spools, reversing means, saidreversing means comprising oppositely arranged spring members, saidreversing means including mechanism for rendering the efiective tensionof. said spring members dependent upon the amount of ribbon on therespective ribbon spools, holding dogs, dog retaining members, and ayoke member operatively connecting said holding dogs.

9. A ribbon mechanism for typewriting machines, including ribbon spools,means for actuating said ribbon spools, reversing means, said reversingmeans including pivoted follower members adapted to bear upon the ribbonon said ribbon spools,holding dogs, cam members operatively connectedwith said follower members, spring members operatively connecting saidcam members and said holding dogs, and a yoke member operativelyconnecting said holding dogs.

10. A ribbon mechanism for typewriting machines, comprising ribbonspools, actuating means for said ribbon spools, said actuating meansincluding a universal bar, a link member operatively connected with saiduniversal bar, a spacing bar, and means operatively connecting saidoperating link with said spacing bar, substantially as described.

11. A ribbon mechanism for typewriting machines, including a ribbonvibrator, a yoke member operatively connected to said ribbon vibrator, auniversal bar, an actuating machines, including a ribbon. vibrator, an

inner yoke member pivotally mounted upon the machine frame, an outeryoke member pivotally mounted upon said inner yoke member andoperatively connected to said ribbon vibrator, a universal bar, aslotted bell crank attached to said universal bar, an

actuating link operatively connected to said slotted bell crank and tosaid outer yoke member, and manually controlled means for determiningthe relationship of said actuating link with reference to said slottedbell crank, substantially as described.

13. A ribbon mechanism for typewriting machines, including a ribbonvibrator, an inner yoke member pivotally mounted upon the machine frame,an outer yoke member pivotally mounted upon said inner yoke member, auniversal bar, a slotted bell crank member operatively connected withsaid universal bar, an actuating link, means attached to said actuatinglink and adapted to cooperate with said slotted bell crank, a

thumb piece, and means connecting said 10 thumb piece With saidactuating link, substantially as described.

In testimony whereof I aflix my signature in presence of two Witnesses.

CHARLES SPIRO. WVitnesses:

EDWD. E. JONES, ALBERT T. HOELEN.

' Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents.

Washington, D. G.

